168 lines
3.3 KiB
Go
168 lines
3.3 KiB
Go
package brotli
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/* Copyright 2013 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/* Bit reading helpers */
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/* Copyright 2016 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/* Macros for compiler / platform specific features and build options.
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Build options are:
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* BROTLI_BUILD_32_BIT disables 64-bit optimizations
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* BROTLI_BUILD_64_BIT forces to use 64-bit optimizations
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* BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations
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* BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations
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* BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
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* BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned
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read and overlapping memcpy; this reduces decompression speed by 5%
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* BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs
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* BROTLI_DEBUG dumps file name and line number when decoder detects stream
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or memory error
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* BROTLI_ENABLE_LOG enables asserts and dumps various state information
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*/
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type brotli_reg_t uint64
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/* Read / store values byte-wise; hopefully compiler will understand. */
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func BROTLI_UNALIGNED_LOAD16LE(p []byte) uint16 {
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var in []byte = []byte(p)
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return uint16(in[0] | in[1]<<8)
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}
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func BROTLI_UNALIGNED_LOAD32LE(p []byte) uint32 {
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var in []byte = []byte(p)
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var value uint32 = uint32(in[0])
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value |= uint32(in[1]) << 8
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value |= uint32(in[2]) << 16
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value |= uint32(in[3]) << 24
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return value
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}
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func BROTLI_UNALIGNED_LOAD64LE(p []byte) uint64 {
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var in []byte = []byte(p)
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var value uint64 = uint64(in[0])
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value |= uint64(in[1]) << 8
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value |= uint64(in[2]) << 16
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value |= uint64(in[3]) << 24
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value |= uint64(in[4]) << 32
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value |= uint64(in[5]) << 40
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value |= uint64(in[6]) << 48
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value |= uint64(in[7]) << 56
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return value
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}
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func BROTLI_UNALIGNED_STORE64LE(p []byte, v uint64) {
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var out []byte = []byte(p)
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out[0] = byte(v)
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out[1] = byte(v >> 8)
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out[2] = byte(v >> 16)
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out[3] = byte(v >> 24)
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out[4] = byte(v >> 32)
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out[5] = byte(v >> 40)
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out[6] = byte(v >> 48)
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out[7] = byte(v >> 56)
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}
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func brotli_min_double(a float64, b float64) float64 {
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if a < b {
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return a
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} else {
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return b
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}
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}
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func brotli_max_double(a float64, b float64) float64 {
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if a > b {
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return a
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} else {
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return b
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}
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}
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func brotli_min_float(a float32, b float32) float32 {
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if a < b {
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return a
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} else {
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return b
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}
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}
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func brotli_max_float(a float32, b float32) float32 {
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if a > b {
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return a
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} else {
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return b
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}
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}
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func brotli_min_int(a int, b int) int {
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if a < b {
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return a
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} else {
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return b
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}
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}
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func brotli_max_int(a int, b int) int {
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if a > b {
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return a
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} else {
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return b
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}
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}
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func brotli_min_size_t(a uint, b uint) uint {
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if a < b {
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return a
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} else {
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return b
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}
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}
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func brotli_max_size_t(a uint, b uint) uint {
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if a > b {
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return a
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} else {
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return b
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}
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}
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func brotli_min_uint32_t(a uint32, b uint32) uint32 {
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if a < b {
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return a
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} else {
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return b
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}
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}
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func brotli_max_uint32_t(a uint32, b uint32) uint32 {
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if a > b {
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return a
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} else {
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return b
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}
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}
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func brotli_min_uint8_t(a byte, b byte) byte {
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if a < b {
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return a
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} else {
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return b
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}
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}
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func brotli_max_uint8_t(a byte, b byte) byte {
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if a > b {
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return a
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} else {
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return b
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}
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}
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